20489755

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{28657}}^1$

素因数の和:28686

約数の個数: 16

約数和(自身を含む): 28887264

約数和(自身を除く): 8397509

約数列:

[1, 5, 11, 13, 55, 65, 143, 715, 28657, 143285, 315227, 372541, 1576135, 1862705, 4097951, 20489755]

約数ペア:

[(1, 20489755), (5, 4097951), (11, 1862705), (13, 1576135), (55, 372541), (65, 315227), (143, 143285), (715, 28657)]